Question

A 4.00-cm tall light bulb is placed a distance of 35.5 cm from a diverging lens having a focal length of -12.2 cm, determine the image distance and the image size.

Answer 1

Answer:

Image distance : - 36 cm

Image size : 1 cm

Explanation:

u = - 35.5 cm

f = - 12.2 cm

Lens formulae: 1/v - 1/u = 1/f

1/v = - 1/12 - 1/36

1/v = -4 /36

v = - 9 cm

Magnification : hi /ho = v /u

hi /4 = - 9 / - 36

hi = 1 cm